Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/65-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.05 (788.7) | 33.16 (842.2) | 2.11 (53.5) 6.8% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 97.55 (2477.77) | 104.17 (2645.85) | 6.62 (168.08) 6.8% |
| Sidewall Height inches (mm) | 6.53 (165.75) | 7.58 (192.5) | 1.05 (26.75) 16.1% |
| Revolutions per mile (km) | 649.51 (403.59) | 608.25 (377.95) | -41.26 (-25.64) -6.4% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.36 mph (34.37 km/h) |
| 25 mph (40.23 km/h) | 26.7 mph (42.96 km/h) |
| 30 mph (48.28 km/h) | 32.03 mph (51.56 km/h) |
| 35 mph (56.33 km/h) | 37.37 mph (60.15 km/h) |
| 40 mph (64.37 km/h) | 42.71 mph (68.74 km/h) |
| 45 mph (72.42 km/h) | 48.05 mph (77.33 km/h) |
| 50 mph (80.47 km/h) | 53.39 mph (85.93 km/h) |
| 55 mph (88.51 km/h) | 58.73 mph (94.52 km/h) |
| 60 mph (96.56 km/h) | 64.07 mph (103.11 km/h) |
| 65 mph (104.61 km/h) | 69.41 mph (111.7 km/h) |
| 70 mph (112.65 km/h) | 74.75 mph (120.3 km/h) |
| 75 mph (120.7 km/h) | 80.09 mph (128.89 km/h) |
| 80 mph (128.75 km/h) | 85.43 mph (137.48 km/h) |
| 85 mph (136.79 km/h) | 90.77 mph (146.07 km/h) |
| 90 mph (144.84 km/h) | 96.1 mph (154.67 km/h) |
| 95 mph (152.89 km/h) | 101.44 mph (163.26 km/h) |
| 100 mph (160.93 km/h) | 106.78 mph (171.85 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1548 | 1798 | 1937 | 2022 | 2114 | 2180 | 2253 | 2338 | 2457 | 2575 | 2707 | 2813 | 3004 | 3214 | 3379 | 3484 | 3544 | 3761 | 4064 | 4723 |
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